/Engine/Plugins/Runtime/DataRegistry/Source/DataRegistry/Public/DataRegistrySubsystem.h
Unregisters all previously registered assets in a specific registry with a specific priority, can be used as a batch reset. Returns number of assets unregistered
int32 UnregisterAssetsWithPriority ( [FDataRegistryType](API\Plugins\DataRegistry\FDataRegistryType) RegistryType, int32 AssetPriority )